COMPLIANCE INFO_AMENDED JTD 1/5/2026

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Permit Unit Requirements for N-4070-1-11 (continued) Page 5 of 14 PERMIT UNIT REQUIREMENTS CONTINUE ON NEXT PAGE These terms and conditions are part of the Facility-wide Permit to Operate. Facility Name: FOOTHILL SANITARY LANDFILL Location: 6484 N WAVERLY RD,LINDEN, CA 95236 N-4070-1-11 : 9/24/2025 3:25:45 PM -- ROBINSOM 47. The owner or operator shall monitor each well monthly for temperature. If a well exceeds 55 degrees Celsius, action shall be initiated within 5 calendar days to correct the exceedance. Any attempted corrective measure shall not cause exceedances of other operational or performance standards. If a landfill gas temperature less than 55 degrees Celsius cannot be achieved within 15 days of the initial exceedance, the owner or operator shall conduct a root cause analysis and correct the exceedance as soon as practicable, but no later than 60 days after the initial exceedance. If corrective actions cannot be fully implemented within 60 days following the initial exceedance, the owner or operator shall also conduct a corrective action analysis and develop an implementation schedule to complete the necessary corrective action(s) as soon as practicable, but no more than 120 days following the initial exceedance. For corrective actions that cannot be completed within 60 days of the initial exceedance, the owner or operator shall submit the root cause analysis conducted, including a description of the recommended corrective action(s), the date for corrective action(s) already completed, and, for action(s) not already completed, a schedule for implementation, including proposed commencement and completion dates as part of the next annual report. If corrective action is expected to take longer than 120 days to complete after the initial exceedance, the owner or operator shall submit the root cause analysis, corrective action analysis, and corresponding implementation timeline to the APCO no later than 75 days after the initial exceedance. [40 CFR 62.16720(a)(4) and 40 CFR 63.1960(a)(4)] Federally Enforceable Through Title V Permit 48. If the landfill gas temperature measured at the wellhead or at any point in the well is greater than 76.7 degrees Celsius (170 degrees Fahrenheit) and the carbon monoxide concentration is greater than or equal to 1,000 ppmv the corrective action(s) for the wellhead temperature standard shall be completed within 15 days of the exceedance. [40 CFR 63.1960(a)(4)(i)(D] Federally Enforceable Through Title V Permit 49. When landfill gas temperature measured at either the wellhead or at any point in the well is greater than or equal to 76.7 degrees Celsius (170 degrees Fahrenheit) and the carbon monoxide concentration is greater than or equal to 1,000 ppmv then the operator shall report the date, time, well identifier, temperature and carbon monoxide reading to the APCO via email within 24 hours of the measurement unless a higher operating temperature has been approved by the APCO. [40 CFR 63.1981(k)] Federally Enforceable Through Title V Permit 50. Permittee shall monitor temperature of the landfill gas on a monthly basis as described in the conditions that reference 40 CFR 62.16720(a)(4) and condition that references 40 CFR 63.1960(a)(4) in this permit. The temperature measuring device shall be calibrated annually using the procedure in Section 10.3 of EPA Method 2 of appendix A-1 to 40 CFR Part 60. [40 CFR 62.16722(a)(3) and 40 CFR 63.1961(a)(3) and (4)] Federally Enforceable Through Title V Permit 51. Permittee shall initiate enhanced monitoring at each wellhead with a measurement of landfill gas temperature greater than 62.8 degrees Celsius (145 degrees Fahrenheit). Enhanced monitoring shall consist of the following: (1) Visual observations for subsurface oxidation events (smoke, smoldering ash, damage to well) within the radius of influence of the well; (2) Oxygen concentration monitoring using a portable gas composition monitor or an oxygen meter as provided in the conditions that reference 40 CFR 63.1961(a)(2) in this permit; (3) Landfill gas temperature monitoring at the wellhead as provided in the condition that references 40 CFR 62.16722(a)(3) in this permit; (4) Landfill gas temperature monitoring every 10 vertical feet of the well using a temperature measuring device as provided in the condition that references 40 CFR 63.1961(a)(6) in this permit; (5) Methane concentration monitoring with a methane meter using EPA Method 3C of appendix A-6 to 40 CFR Part 60, EPA Method 18 of appendix or a portable gas composition analyzer provided that the analyzer is calibrated and meets all the quality assurance and quality control requirements for EPA Method 3C or EPA Method 18; and (6) Carbon monoxide concentration monitoring as provided in the condition that references 40 CFR 63.1961(a)(5)(vi) in this permit. [40 CFR 63.1961(a)(5)] Federally Enforceable Through Title V Permit